Trisazo cupriferous dyestuffs



United States Patent 3,021,322 TRISAZO CUPRIFEROUS DYESTUFFS Marcel Jirou, Sotteville-les-Rouen, and Vassili Urn, Rouen, France, assignors to Compagnie Francaise des Matieres Colorantes, Paris, France, a French company No Drawing. Filed Nov. 14, 1958, Ser. No. 773,842 Claims priority, application France Nov. 16, 1957 6 Claims. (Cl. 260-145) The present invention relates to the cupriferous complexes of the tn'sazo dyestuffs of the general formulae:

| SQ H 3,021,322 Patented Feb. 13, 1962 in which R, R' and X have the same significance as above, by means of divalent copper compounds. The O-alkyl group is converted into a hydroxyl group by hydrolysis; the copper becomes attached to the hydroxyl.

groups in the ortho-ortho' position to the azo linkage.

Excess of copper is generally necessary in order to bring about the complete hydrolysis of the O-alkyl group, and this excess leads in addition to the formation of a chelated complex between the copper and the hydroxyl and the carboxyl groups of the salicylic acid residue or its substituted derivative.

Once the metallisation is finished, it is important to destroy this chelated complex in order to obtain a dyestufi which is more easily soluble in water and of brighter.

shade. For this purpose, sequestering agents may be used, for example, the tetra-sodium salt of ethylenediamine-tetra-acetic acid; the complex is selectively demetallised either by addition of the sequestering agent to the reaction mixture after the dealkylating metallisation, by subsequent treatment of the complex isolated from the reactionmedium, by mixing the sequestering agent with the isolated and dried-complex, or by addition of the sequestering agent to the dyebath.

The 1:1 complexes of the invention are particularly suitable for dyeing vegetable fibres, shades which are fast to light and to washing being obtained.

The examples below, in which the parts indicated are parts by weight, illustrate the present invention without restricting it.

Example 1 95.5 parts of the trisazo dyestutf of the formula:

OOH; OH

proportion of one atom of metal per molecule of dyestutf. By acylamino groups are meant groups such as for example the following: acety1amino, benzoylamino, ethoxy carbonylamino, methoxyethoxy-carbonylamino, simple nreido H NCONH or nreido substituted on the NH group.

The complexes of the present invention can be prepared by dealkylating metallisation of the dyestuffs of the general formulae:

0 alkyl J. N-R

soar (IV) are dissolved in the form of the sodium salt in 2400 parts of water at C. This solution is treated with'lO parts of sodium bicarbonate. A solution'comprising 30 parts of crystalline copper sulphate, parts of water and 56.5 parts of 20% by volume of ammonia is slowly added. The mixture is heated for 12 hours at 90-92 C. and the dyestuff is separated by the addition of sodium chloride. The paste of the cnpric compound-is taken up with 2500 parts of a 1% solution of the tetra-sodium salt of ethylene-diamine-tetra-acetic acid. The mixture is heated at 80-85 C, for 30 minutes and the dyestuff is reciprocated by the addition of sodium chloride; this dyestufi then only contains one atom of metal in its molecule. It dyes cellulosic fibres a green shade which verges on olive,

If, instead of treating the product from the copper treatment with the solution of the sequestering agent, it i g nd t th la ter W th d ying, a mixture is ob tained which dyes cellulosic fibres the same shade.

Example 2 The 95.5 parts of the dyestufi used in Example 1 are 3 replaced by 101.2 parts of the trisazo compound of the formula:

and 61630 parts of copper sulphate by 35 partsof copper sulphate. On operating under conditions similar to those of Example 1,. a. copper complex containing only One atom of metal. per. molecule of dyestufi. is obtained after treatment with the sequestering agent. This complex dyescellulosic fibres a bright olive green.

Example 3 The operation, is, as in; Example 1,v but 1051 parts: of the trisazo dyestuif of the following formula are used:

7 4 ample 3. A dyestufi is obtained which dyes cellulosic fibres a yellowish shade verging on olive.

OCH; $11 ITIHCOCH;

SO3H 50 11 We claim:

1. Cupriferous complexesofl trisazo dyestuffs selected from thoseof generalformulae:

in which R represents the salicylic acid residue, R repre- Once the metallisationi finishedz-concentratedtsolution of. the; tetrarsodium salt of: ethylenediam-ine tetrae acetic acid is introduced at 90 C into thercactiorn liquid in such quantity that its concentration is equal to 1% in the mixture. After 30 minutes of agitation at 90.? Q, the dyestuffs is iisolatedl by, add ngysodium. chloride to the liquid. The, copper complex thus obtained contains only one atom ofi copper per molecule of dyestutR-and dyes cellulosic fibres green.

Example/4 The copper complex of the trisazo dyestufi of the formula:

is prepared according-tothe directions: in= Example 2-.- Thed'yestufl obtained d'yes cellulosic fibres olive green:

7 Erampl 5 107.2. parts oi the trisazedyestufivoi the formula:

are formed into a chelated -complex with copper and then sent's aimemlierrselectedffiom the grou consisting; ofi the acetylaminor monosulpho-Lhydroxynaplithyl; benzoylammosmonosulpho lrhydroxynaphthylgr ethoxycarbony-l amino-monosulpho-l-hydroxynaphthyl, methoxyethoxycarbonylamino monosulpho-l-hydroxynaphthyl, ureidomonosulphmldiydroxynaphthyl, and hydroxyethylureidomonosulpho-l-hydroxynaphthyl fixed: om the? group at thepositiOn 2, and X represents a member selected from the group. consisting of. the hydrogen atom and NHCOO 0.38 A CHI the sulphonic group, thecdivalent copper in these comselectively demetallisedaccording to the processor Explexes *beingnttached to the trisazo dyestuff through the 3,021,322 5 6 hydroxyl groups of the o:o'-dihydroxyazo grouping redyestuff by the o:o-dihydroxyazo grouping resulting sulting from the hydrolysis of the O-alkyl grouping in the from the hydrolysis of the OCH grouping.

proportion of one atom of metal per molecule of dyestufi. 5. The copper complex of the dyestufi of the formula:

( OH, Ho HOQN=NONHOQON=N N=N -so,H

in which an atom of divalent copper is attached to the 2. The copper complex of the dyestuff of the formula: dyestufi by the o:o-dihydroxyazo grouping resulting ooH, no HO- -lN=NC CONH-QN=N N=N SO;H

002E so rr so,H in which an atom of divalent copper is attached to the from the hydrolysis of the OCH grouping. dyestuff by the o:o'-dihydroxyazo grouping resulting 6. The copper complex of the dyestutf of the formula:

OCH; Ho HOQN=NOOONHQ NH-COO COQH OCH; sonar from the hydrolysis of the OCH grouping. v Y

3 The copper complex of the dyestufi of the formula: in WhlCh an atom of divalent copper 1s attached to the ?QH= HQ!) DlIHGOOHa HO-C N=NO-NHCOON=N N=N (mm so r:

in which an atom of divalent copper is attached to the dyestufi by the ozo-dihydroxyazo grouping resulting from the hydrolysis of the OCH3 grouping. dyestufi by the o.o-d1hydroxyazo grouping resulting 4. The copper complex of the dyestufi of the formula:

(Inn, no no =NO00NHQN=N N=N- NH 60 0 :H S O H HO :8

NH S 0 3H 621140 H in which an atom of divalent copper is attached to the from the hydrolysis of the OCH grouping.

References Cited in the file of this patent UNITED STATES PATENTS 787,416 Great Britain Dec. 11, 1957 

1. A CUPRIFEROUS COMPLEXES OF TRISAZO DYESTUFFS SELECTED FROM THOSE OF THE GENERAL FORMULAE: 